JEE Main 202120 Jul, Morning shiftMathematicsMediumCoordinate Geometry478× since 2002
Let y = mx + c, m > 0 be the focal chord of y² = 64x, which is tangent to (x + 10)² + y² = 4. Then, the value of 4 (m + c) is equal to _____________.
JEE Main 2021 · 20 Jul, Morning shift · Q45